Sampling device for water conservancy project

The sampling device comprises a fixing table and a filtering mechanism, and fixing blocks are fixedly connected to the centers of the left side and the right side of the front end of the fixing table correspondingly; the filtering mechanism comprises a containing box, the bottom end of the inner wall of the containing box is fixedly connected with a micro pump, the output end of the micro pump is communicated with an inner cavity of the water sample box, and a cover plate is arranged at the top end of the water sample box. By rotating a rotating block, the rotating block drives a first bevel gear to rotate, a second bevel gear matched with the first bevel gear in an engaged mode rotates along with the rotating block, the second bevel gear drives a driven shaft to rotate, the driven shaft drives a threaded rod to rotate, and a cavity shaft matched with the threaded rod in a threaded mode is limited by matching of a limiting block and a limiting groove. The two clamping blocks are driven to move in the directio